根本的に異なる抗酸化物質: 鎖破りの抗酸化物質として熱的に生成された炭素中心のラジカル

Mathieu Frenette¹, Patricia D MacLean, L Ross C Barclay

¹Department of Chemistry, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada.

Journal of the American Chemical Society

|December 21, 2006

まとめ

新しいジメール基は強力な抗酸化物質として作用し,商用オプションの性能を上回ります. 放射線解離による温度とともに活性が著しく増加し,酸化に対する保護を強化します.

科学分野:

有機化学オーガニック・ケミストリー
ポリマーサイエンスの科学
マテリアルサイエンス材料科学

背景:

オート酸化は,材料の分解において重要な課題となっています.
イルガノックスHP-136のような既存の抗酸化物質には限界があります.
持続的なラジカルは,抑制のためのユニークな反応性を提供します.

研究の目的:

熱で活性化された抗酸化物質の新種のクラスを導入する.
抗酸化剤としての持続根幹ジメルの有効性を評価する.
これらの新しい化合物の温度に依存する活動を調査する.

主な方法:

持続的な炭素中心のラジカルジメルの合成.
クメンとスタイレンを用いたオート酸化阻害アッセイ.
変化する温度で抗酸化物質の活性に関する運動分析.

主要な成果:

ラジカルジメは,商業標準と比較して優れた抗酸化活性を示した.
抑制の速度定数は,Irganox HP-136および3,5-di-tert-butyl-4-hydroxyanisoleよりも有意に優れていた.
抗酸化物質の活性度は,気温上昇に伴い劇的な増加を示した.

結論:

持続的な根幹二元は,熱的に活性化された抗酸化物質の有望な新しいクラスを表しています.
温度に依存するダイマーの分離が,抗酸化物質の性能を高めます.
これらの発見は,材料の安定化を改善する可能性を秘めています.

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